Method _update_selection

scene/debugger/scene_debugger.cpp:2124–2253

}

void RuntimeNodeSelect::_update_selection() {
	Window *root = SceneTree::get_singleton()->get_root();

	RS::get_singleton()->canvas_item_clear(sbox_2d_ci);
	RS::get_singleton()->canvas_item_set_visible(sbox_2d_ci, selection_visible);

	for (LocalVector<ObjectID>::Iterator E = selected_ci_nodes.begin(); E != selected_ci_nodes.end(); ++E) {
		ObjectID id = *E;
		CanvasItem *ci = ObjectDB::get_instance<CanvasItem>(id);
		if (!ci) {
			selected_ci_nodes.erase(id);
			--E;
			continue;
		}

		if (!ci->is_inside_tree()) {
			continue;
		}

		Transform2D xform;
		// Cameras (overridden or not) don't affect `CanvasLayer`s.
		if (root->is_canvas_transform_override_enabled() && !(ci->get_canvas_layer_node() && !ci->get_canvas_layer_node()->is_following_viewport())) {
			xform = root->get_canvas_transform_override() * ci->get_global_transform();
		} else {
			xform = ci->get_global_transform_with_canvas();
		}

		// Fallback.
		Rect2 rect = Rect2(Vector2(), Vector2(10, 10));

		if (ci->_edit_use_rect()) {
			rect = ci->_edit_get_rect();
		} else {
#ifndef PHYSICS_2D_DISABLED
			CollisionShape2D *collision_shape = Object::cast_to<CollisionShape2D>(ci);
			if (collision_shape) {
				Ref<Shape2D> shape = collision_shape->get_shape();
				if (shape.is_valid()) {
					rect = shape->get_rect();
				}
			}
#endif // PHYSICS_2D_DISABLED
		}

		const Vector2 endpoints[4] = {
			xform.xform(rect.position),
			xform.xform(rect.position + Point2(rect.size.x, 0)),
			xform.xform(rect.position + rect.size),
			xform.xform(rect.position + Point2(0, rect.size.y))
		};

		const Color selection_color_2d = Color(1, 0.6, 0.4, 0.7);
		for (int i = 0; i < 4; i++) {
			RS::get_singleton()->canvas_item_add_line(sbox_2d_ci, endpoints[i], endpoints[(i + 1) % 4], selection_color_2d, 2);
		}
	}

#ifndef _3D_DISABLED